how to change-set the margins using wordpad?

On wordpad I have a ruler at the top. 0 on the left and 6 on the top. When I move the small "whatever it is called" to the right to 7 inches or more it does not hold.
If I am creating a text document, I type what I want and pay no attention to the length of each line. It gets to the end of each line and starts over on the left side. But, when I print, some lines have only 1 word. All text beyond 6 inches gets shifted to the next line.
I'm just trying to print an 8.5 x 11 page document using paragraphs.
I changed the margins on the left and right, both, to 1 inch but that did not help. The left side is fine but the right is not.
Thanks,

The ruler adjustment is now holding itself at 7 1/4 inches or -1.25 right margin. Though my text extends completely across the page it is printing the way I wanted, centered with equal margins on both sides and no distorted lines such as 1 word on a line. Will withdraw the question.

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